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Math Help - Am I doing this calculus problem right?? (related rates)?

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    Am I doing this calculus problem right?? (related rates)?

    Here is the question #42 part A and B





    This is the work I have done so far and I would like to know if it is right




    If I am doing anything wrong please correct me. Also when I replace r with (3/5)h I think it's supposed to be (3/6).
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by imbored205 View Post
    Here is the question #42 part A and B





    This is the work I have done so far and I would like to know if it is right




    If I am doing anything wrong please correct me. Also when I replace r with (3/5)h I think it's supposed to be (3/6).
    All looks well...until you replace r in part (b).

    It should be r=\frac{2.5}{5}h. You can make this adjustment by keeping in mind that the radius has a value of 3 only when the height is 6. It is also good to take note that the radius is half the value of the height withing the cone...

    --Chris
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